Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 92, NWS Twin Cities, MN

May 28, 2002Blue Earth County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 2002, 1:45 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 28, 2002, 1:45 PM CDT (18:45 UTC)
Expired: May 28, 2002, 2:30 PM CDT
In force: 45 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Blue Earth County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 88 km from the middle of the area, began a volume at 18:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 28, 1:54 PM CDT	Thunderstorm Wind 52 M	Janesville, MN	Measured by storm chaser. No damage.
May 28, 2:00 PM CDT	Hail 0.75	St Clair, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.8 hours before the alert went out and 87 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 60 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 1148 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KMPX 281845
SVRMSP
MNC013-161-281930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
144 PM CDT TUE MAY 28 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA
  WASECA COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 230 PM CDT

* AT 144 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL OVER ST CLAIR...OR ABOUT 9 MILES SOUTHEAST OF MANKATO...MOVING
  NORTHEAST AT 20 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  JANESVILLE.
  MADISON LAKE.
  PEMBERTON.
  SKYLINE.
  ST CLAIR.

THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS AWAY FROM
WINDOWS.

LAT...LON 4417 9411 4389 9389 4394 9367 4418 9368
          4424 9393

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 2:05 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Watonwan	25 min
May 28, 1:13 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Sibley	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.